| 摘要 |
<p>PURPOSE:To provide the intra-osseous implant which has surface roughness to prevent flawing of the bone tissue, has high affinity to the bone tissue and prevents degrading of intra-osseous fixing force by roughening the max. surface roughness of a core body to a specific value, then thermally spraying bioactive material powder to the outer periphery of this core body, thereby forming a coating layer having the max. surface roughness of a specific value. CONSTITUTION:The surface of the core body 1 consisting of titanium is subjected to washing and surface roughening to the max. surface roughness of 20 to 40mum by a blasting treatment. The bioactive material powder having a grain size of, for example, <=80mum is then thermally sprayed in gaseous plasma formed of argon and helium, nitrogen or hydrogen to this surface by using a plasma thermal spraying device to form a coating layer 2, by which the intra-osseous implant is produced. The max. surface roughness of the coating layer 2 is specified to 30 to 50mum. The intra-osseous implant does not generate an excessive attack to the bone and has excellent affinity to the bone when implanted into the living body. The degradation in the strength does not arise and the higher safety and stability are obtd.</p> |
